Torque output mechanism for constant torque electric wrench

The utility model discloses a torque output mechanism for a constant torque electric wrench. According to the technical scheme, the output mechanism comprises a counterforce arm and a sleeve. The counterforce arm is jointed with a speed shifting mechanism through a clamping groove. One end of the sleeve is jointed with a planetary carrier of the speed shifting mechanism through a clamping groove. A bearing is fixed between the counterforce arm and the sleeve. A guide sleeve is matched with the sleeve in a sliding way, and is fixed on the counterforce arm. The torque output mechanism has the advantages that a connecting mode for the torque output mechanism and the speed shifting mechanism is changed, an output shaft, a front cover and the like are eliminated, and components of the mechanism are simplified; the improved output structure is wholly jointed with the speed shifting mechanism, so that procedures are simplified, working efficiency is improved, and the labor intensity of a worker is reduced; the outpu